Alkalic Syenite
Coined by the early Roman scholar Pliny the Elder, the term syenite was originally used to designate rocks that looked similar to the hornblendic granite found in Syene, Egypt, which was widely used in ancient times for construction. However, today the word is generally utilized to refer to any of a class of intrusive igneous rocks primarily composed of alkali feldspar and a ferromagnesian mineral.
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